< This commercial quality professional unit starts off with a 2" x 3" 11 gauge steel main frame. The dual axis biomechanically correct pulldown arms ride on maintenance free sealed bearings. The 360 degree articulating hand grips allow your God given natural body mechanics to prevail throughout the entire pulldown range of motion. The gas assisted seat and adjustable knee catch pads will accommodate almost every body size and type. If you want a barn door back, then this machine is a keeper!